Focal Aria 948

I’ve never heard the complaint the 948 had not sufficient bass extension but the opposite it was bass heavy. I had 906 for a while and they had excellent bass extension for the size, very room filling kind of bass. It was a little on the slow side but nice sounding speaker none the less just not very punchy. 

i have Aria 936 powered by Parasound A21+. I think you'll like JBL HDI-3800. I have gotten 3800s a few months ago (March 2023) and like them more than 936s. Specifically bass.

The Parasound A21+ is a hugely (!) more powerful amp than the Pioneer 1250. 

I have 936’s (6” woofers vs 8” in your 948’s) and the bass is outstanding. Please note that the impedance curve drops below 3 ohms in the mid bass region. With a PrimaLuna integrated and a Mac MA352, I’ve enjoyed those speakers immensely. I even drove them with a vintage Sansui AU717 with excellent bass. An alternative might be Revel f208’s…similar price point.

 No way that Pioneer  amp is doing them justice. Maybe consider a better amp before you ditch the speakers. That being said, this past spring I purchased a pair of Salk Song Towers for a second system. I hooked them up to my main system just to try them out. To say I was quite impressed would be an understatement. Very musical speaker that just made music. Left them in for 2 weeks till wifey said 2 pairs of speakers in LR was too much. Great speaker IMO, but Im not sure your amp would do them justice either. Good luck in your quest.